Electrical Tools

Motor Current Calculator

Calculate rated current and starting current for AC motors. Supports single-phase and three-phase motors with efficiency and power factor.

Motor Specification

Rated Power (kW)

Voltage (V)

Efficiency (%)

Power Factor

Phase

Three-phase Single-phase

Starting Method

DOL (×6) Star-Delta (×2) Inverter (×3)

Three-phase: I = P / (√3 × V × η × cosφ). MCB at 125% Ir per IEC. Cable per IEC 60228 copper ampacity.

Calculate capacitor size for power factor correction (μF) or capacitor energy (J). Supports kW, kVA input with target power factor.

Calculate three-phase active power (kW), apparent power (kVA), and reactive power (kVAR). Also find current from power.

Calculate your monthly Korean electricity bill based on 2024 residential progressive rates. Includes base fee, energy fee, VAT, and electricity fund.